public class Shape {
    private static final String DEFAULT_COLOR = "black";
    private String color;
    public Shape(){
        this(DEFAULT_COLOR);
    }
    public Shape(String color){
        this.color = color;
    }
    public String getColor(){
        return color;
    }
    public void setColor(String color){
        this.color = color;
    }
    public void draw(){
        System.out.println("draw shape");
    }
}